What's the matter with the swelling and tightness of the forehead

The head shows pain and tightness, which may be caused by local vascular compression, intracranial arterial dilation or chemical stimulation, and persistent contraction of head muscles, which can cause similar symptoms. If it shows intracranial space-occupying lesions, such as tumor compression, hydrocephalus, brain edema, resulting in increased intracranial pressure, it will affect the normality of intracranial blood vessels, causing blood vessels to be compressed and pulled, resulting in abnormal vascular deformation, which will cause brain swelling and tightness. Intracranial and extra-intracranial arteriovenous dilation will cause metabolic abnormalities, especially hypertension and diabetes. If the brain is chemically stimulated, such as meningitis, bloody cerebrospinal fluid, it will cause local pressure, and it will also cause swelling and tightness of the head.